title: SPECT/CT of femeroacetabular impingement.
abstract: Femoroacetabular impingement is a recently described condition thought to be associated with early onset osteoarthritis. We describe 2 cases of femoroacetabular impingement that were initially unrecognized despite multimodality imaging, including radiographs, MRI, and scintigraphy. The scintigraphic appearance may mimic avascular necrosis. There are limited reports of femoroacetabular impingement in the nuclear medicine literature. We propose that the finding of increased uptake in the superior femoral neck associated with osteoarthritic uptake involving the superior hip joint suggests the diagnosis of either cam or mixed cam-pincer impingement.
authors.affiliation: Department of Nuclear Medicine, Concord Hospital, Sydney, NSW, Australia.
authors.forename: Allen
authors.initials: A
authors.lastname: Lee
authors.forename: Louise
authors.initials: L
authors.lastname: Emmett
authors.forename: Hans
authors.initials: H
authors.lastname: Van der Wall
authors.forename: Siri
authors.initials: S
authors.lastname: Kannangara
authors.forename: Robert
authors.initials: R
authors.lastname: Mansberg
authors.forename: Ignac
authors.initials: I
authors.lastname: Fogelman
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging* / Q000473:pathology*; D018771:Arthralgia / Q000209:etiology; D003937:Diagnosis, Differential; D005260:Female; D005270:Femur Head / Q000000981:diagnostic imaging / Q000473:pathology; D005272:Femur Neck / Q000000981:diagnostic imaging* / Q000473:pathology*; D050815:Fractures, Compression / Q000175:diagnosis; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000175:diagnosis / Q000473:pathology; D010020:Osteonecrosis / Q000175:diagnosis; D054850:Osteophyte / Q000175:diagnosis; D010024:Osteoporosis / Q000175:diagnosis; D011312:Pressure / Q000009:adverse effects; D015899:Tomography, Emission-Computed, Single-Photon; D014057:Tomography, X-Ray Computed